Declension table of ?ghastavat

Masculine	Singular	Dual	Plural
Nominative	ghastavān	ghastavantau	ghastavantaḥ
Vocative	ghastavan	ghastavantau	ghastavantaḥ
Accusative	ghastavantam	ghastavantau	ghastavataḥ
Instrumental	ghastavatā	ghastavadbhyām	ghastavadbhiḥ
Dative	ghastavate	ghastavadbhyām	ghastavadbhyaḥ
Ablative	ghastavataḥ	ghastavadbhyām	ghastavadbhyaḥ
Genitive	ghastavataḥ	ghastavatoḥ	ghastavatām
Locative	ghastavati	ghastavatoḥ	ghastavatsu

Compound ghastavat -

Adverb -ghastavantam